Coached by Will King, the crew broke a course record against Sydney RC in the semi-final and Isle of Ely in the final. The trophy was previously won in 2013 and 2014.
Gloucester Hartpury crews are now unbeaten at Henley Women's Regatta for five years.

The Gloucester-Hartpury crew of Alice Bowyer, Charlotte Hodgkins-Byrne, Flo Pickles and Jessica Newson with fellow Gloucester rower Beth Rodford.
Gloucester-Hartpury scooped its first ever title at British rowing's premier event - Henley Royal Regatta - as the Under-18s girls quad bounced back from a nasty crash to claim glory.
On the morning of the final, the crew of Alice Bowyer, Charlotte Hodgkins-Byrne, Jessica Newson and Flo Pickles crashed with a moored boat and snapped three oars in their warm-up row.
Luckily, they all escaped uninjured and if they were shaken by the crash, they didn’t show it, recording a comfortable four-length victory to scoop the Diamond Jubilee Challenge cup - a new trophy awarded for the first time in 2014 for the winning Under-18s female crew in the competition's 175th year.